Question

Five bells toll at intervals of 5, 8, 9 and 20 seconds. The bells toll together at 7 o'clock.
When will they again toll together?​

Answer 1

Answer:

8o' clock

Step-by-step explanation:

give in the question, we have to find the common trolling point

that is we have to find the LCM

the LCM of 5,8,9,10 is 360 minutes

now we have convert into hours

1 hour=60 minutes

then 360 minutes is 360/60

=60

then they must troll at after one hour

that is 7+1 = 8

therefore they again troll at 8o' clock